Mode of electrochemical deposition on the structure and morphology of bimetallic electrodes and its effect on nitrate reduction toward nitrogen selectivity

Su, Jenn Fang; Kuan, Wei‐Fan; Liu, Huijuan; Huang, Chin‐Pao

doi:10.1016/j.apcatb.2019.117909

Cited by 72 publications

(30 citation statements)

References 48 publications

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“…[23] The conventional approach involves catalytic conversion of nitrite and nitrate ions into nonpolluting nitrogen molecules. [24] Although the harmless treatment of harmful substances has been achieved, however, it cannot realize the transformation and upgrading of materials and the maximum utilization of energy and waste resources. Subsequent researches are focused on the electrocatalytic reduction of nitrite and nitrate ions into ammonia, also meeting the problem for fabrication of The typical H cell for urea electrocatalytic synthesis.…”

Section: Coupling Of Carbon Dioxide and Nitrite/nitrate For Urea Synthesismentioning

confidence: 99%

Electrocatalytic C–N Coupling for Urea Synthesis

2021

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The industrial urea synthesis consists of two consecutive processes, nitrogen + hydrogen → ammonia followed by ammonia + carbon dioxide → urea. The electrocatalytic coupling of carbon source (carbon dioxide) and nitrogen source (nitrogen, nitrite, nitrate) by skipping the ammonia synthetic process might be a promising alternative to achieve the efficient urea synthesis; in this case, two industrial steps with high energy consumption and high pollution are optimized into one renewable energy‐driving electrocatalytic process. Herein, the progress of green urea synthesis is summarized, focusing on the electrocatalytic coupling of carbon source and nitrogen source for direct urea synthesis under ambient conditions. The mechanism researches for urea synthesis are also reviewed, and the future development directions of electrocatalytic urea synthesis are prospected. The electrocatalytic C–N coupling reaction realizes the efficient resource utilization and provides guidance and reference for molecular coupling reactions.

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Section: Coupling Of Carbon Dioxide and Nitrite/nitrate For Urea Synthesismentioning

confidence: 99%

Electrocatalytic C–N Coupling for Urea Synthesis

2021

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“…[64] Many treatment technologies including biological denitrification, ion exchange, physical adsorption, membrane separation, as well as chemical and electrochemical reduction have been employed for efficient removal of nitrate. [65,66] To the best of our knowledge, however, thrilling investigations about the disposal of nitrate via the collaborative process of HER and electrochemical reduction are available. Very recently, our group have confirmed that the HER process of Ni 2 P/CC catalyst can be competent for nitrate removal with an efficiency of 63.2 %; [67] however its electroreduction property is far from the practical requirement and should be further enhanced.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

et al. 2020

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Nickel phosphide (Ni 2 P) has been widely explored toward hydrogen evolution reaction (HER) for desirable durability and high performance. Tuning the electronic structures and morphologies of Ni 2 P plays a pivotal role in the improvement of HER performance. In this work, three Ni 2 P catalysts were fabricated by different strategies and their HER properties were compared. It was found that the bicontinuous porous structured Ni 2 P on Ni foam (Ni 2 P /NFÀ EHP) prepared using coupled electroless nickel-phosphorus (NiÀ P) plating, hydrothermal synthesis and low temperature phosphorization techniques, exhibits the best catalytic activity and a wide pH adaptability. The overpotential at 10 mA cm À 2 and Tafel slope are 78 mV and 33 mV dec À 1 in 0.5 M H 2 SO 4 , those in 1 M PBS are 125 mV and 93 mV dec À 1 , and 101 mV and 76 mV dec À 1 in 1 M KOH. Additionally, the Ni 2 P/NFÀ EHP-catalyzed HER process is also applicable for nitrate reduction with a remarkable removal efficiency of 92.6 %. This catalyst also exhibits a desirable durability both in HER and nitrate reduction. This work offers an efficient strategy to exploit compatible pH-universal HER catalysts, explores the engineering application of HER process in nitrate reduction.

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“…•− -based advance oxidation has been used previously in the field of landfill leachate treatment, to remove NH 4 + and gaseous ammonia [32]. Therefore, in the present study, NH 4 + removal was assessed using persulfate in a 3D PS-Co/AC 0.9 -AB 0.1 system, with the aim of increasing TN removal.…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical reduction is a feasible option for the conversion of NO 3 − to N 2 , with the benefits of simple operational methods, low-environmental impact and economic efficiency [ 4 ]. The electro-reduction of NO 3 − occurs via a complex process involving multi-electron transfer between the different valence states of nitrogen and its reaction products, such as N 2 H 4 , NH 3 , NH 2 OH, N 2 , N 2 O, NO, NO 2 − , and NO 2 [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of Ammonia Using Persulfate during the Nitrate Electro-Reduction Process

Yang

You

et al. 2022

IJERPH

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NH4+ is often produced during the electro-reduction of NO3−, which results in inadequate total nitrogen (TN) removal during advanced sewage treatment. In this study, the electro-reduction byproduct NH4+ was oxidized and removed using sulfate radical (SO4•−)-based advanced oxidation. Persulfate (PS) was activated by electrocatalysis, using Co/AC0.9-AB0.1 particle electrodes to produce SO4•−. Results showed that when the influent concentration of NO3−-N was 20 mg/L, a PS dosage of 5.0 mM could completely oxidize NH4+ at 0.1 A (nondetectable in effluent) reducing the TN concentration from 9.22 to 0.55 mg/L. The presence of coexisting PO43−, CO32− and humic acid suppressed the oxidation and removal of NH4+. Electron spin resonance (ESR) spectra and quenching experiments revealed SO4•− as the dominant radical in the process of indirect NH4+ oxidation, while •OH radicals only had an assisting role, and the surface accumulated free radicals were responsible for the indirect oxidation of NH4+. Cyclic voltammetry (CV) curves indicated that NO3− was primarily reduced via atomic H*-mediated indirect reduction. Therefore, the activation of PS using Co/AC0.9-AB0.1 particle electrodes might be a promising alternative method for oxidizing byproduct NH4+ in the electro-reduction of NO3− and reduce TN concentration in advanced sewage treatment.

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Mode of electrochemical deposition on the structure and morphology of bimetallic electrodes and its effect on nitrate reduction toward nitrogen selectivity

Cited by 72 publications

References 48 publications

Electrocatalytic C–N Coupling for Urea Synthesis

Electrocatalytic C–N Coupling for Urea Synthesis

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Removal of Ammonia Using Persulfate during the Nitrate Electro-Reduction Process

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Mode of electrochemical deposition on the structure and morphology of bimetallic electrodes and its effect on nitrate reduction toward nitrogen selectivity

Cited by 72 publications

References 48 publications

Electrocatalytic C–N Coupling for Urea Synthesis

Electrocatalytic C–N Coupling for Urea Synthesis

Fabrication of Porous Configurated Ni2P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Removal of Ammonia Using Persulfate during the Nitrate Electro-Reduction Process

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Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction